Dedicated Server with more than 1 ip to be used as Name Server as well

Sir,

My Question is about using One Dedicated Server with four IPS( or more ) out of which 2 are going to be used as Name Servers without any virtualization (OpenVz or any other)but to adjust vi /etc/network/interfaces & remaining 2 ips are used as one Web server and mail servers or sub-domain.

I want to set up this server as

Web Server+Mail+DB - One Nos but with 2 ips, One as website & remaining as virtual ips

DNS Servers as - 2 Nos ( ns1.mydomain.com & ns2.mydomain.com)

Is it advice able to make vi /etc/network/interfaces as under;

auto eth0
iface eth0 inet static
address 192.168.0.001
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
gateway 192.168.0.1

auto eth0:1

address 192.168.0.002
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
gateway 192.168.0.1

for web server & mail server

then under DNS zone set Name Servers & other website records to be Set up

My reference guides are;

http://www.howtoforge.com/perfect_setup_debian_sarge_p3
http://www.howtoforge.com/how-to-ru...-secondary-with-ispconfig-3-debian-squeeze-p3

Please advice

Thanks

Abin